PrivateChatControl now hold room name so that we can draw banner of pm even if room control has been closed. Fixes #2527

introduce GajimGeneralException and use that instead of RunTimeError when raising so instances are not created. This is better because python can also raise RunTimeError, which we will catch by accident and we do not want that to happen

unite room and server name resulting in a room jid interface [so it aligns with add new contact]. fixes #2504

sometimes not, nor in actions->change topic

Note that this disable previous inconsistent behaviour where all gc_messages were counted in
systray
whereas tray icon was not animated. notify_on_all_muc_messages can still be used for that.

one ressource connected.

[Santiago Gala] we can now have a different spellchecking language in each chat window. Fixes #2383 and #746.

don't TB when someone changes his nick before having an assigned color (when he talk for the first time)

events are now saved in an Event class. show in roster/systray options in Advanced Notification Control (for incomming messages) now work.

nick change. Closes #2264.

reset focus_out_end_iter_offset var when we clear the textview. Fixes #2175